# pi

## EnglishEdit

 ← omicron → rho Π π Ancient Greek: πεῖ Wikipedia article on pi
This mosaic is outside the mathematics building at the Technische Universität Berlin.
When a circle's diameter is 1 unit, its circumference is π units.
When a circle's radius is 1 unit, its circumference is 2π units.

### EtymologyEdit

From Ancient Greek πεῖ (peî). Its mathematical use apparently stems from its use as the first letter in περιφέρεια (periféreia, periphery; circumference) and was first cited in 1706 in the Synopsis Palmariorum Matheseos by William Jones.

### PronunciationEdit

• IPA(key): /paɪ/
•  Audio (US) Sorry, your browser either has JavaScript disabled or does not have any supported player. You can download the clip or download a player to play the clip in your browser. (file)
• Rhymes: -aɪ
• Homophone: pie

### NounEdit

pi (plural pis)

1. The name of the sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
2. (mathematics) An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.1415926535897932384626433832795; usually written π.
3. (letterpress typography) Metal type that has been spilled, mixed together, or disordered. Also called pie.

### VerbEdit

pi (third-person singular simple present pies, present participle piing, simple past and past participle pied)

1. (letterpress typography) To spill or mix printing type. Also, "to pie".

pi (not comparable)

1. (typography) Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type.
In computing, pi characters are entered with special combinations of keys like ctrl-alt-x, or via character sequences such as &#123;.

### AbbreviationEdit

pi

1. (typography) pica (conventionally, 12 points = 1 pica, 6 picas = 1 inch)
2. piaster
3. pious
• 1927, Magdalen King-Hall, I Think I Remember: Being the Random Recollections of Sir Wickham Woolicomb, an Ordinary English Snob and Gentleman
Our Major was "Cherub" Cheeseman, noted for his foul language. I am afraid he lost a tidy little legacy that he was expecting from his aunt, the Dowager Lady Shuttlecock (a very "pi" old lady), through this same habit of his.
• 1972, Anya Seton, Green Darkness, Hachette UK (ISBN 9781444709155)
“Those are very 'pi' sentiments. Was a preacher in Staffordshire— I was raised chapel, though've tried to forget it—he talked that way... redemption and the lot.”
• 1994, Roger Gard, Jane Austen's Novels: The Art of Clarity, Yale University Press (ISBN 9780300059267), page 101
In Sense and Sensibility, as even you might agree, there's at least the danger of a rather pi moral framework clamping down on the spontaneous fun and leaving the sisters to survive - a bit drearily - on the periphery of a mean world.

## AlbanianEdit

### EtymologyEdit

From Proto-Albanian *pīja, from Proto-Indo-European *pih₃- (compare Greek πίνω (píno), Serbo-Croatian pìti, Italian bere).

### VerbEdit

pi (first-person singular past tense piva, participle pirë)

1. I drink

#### ConjugationEdit

This verb needs an inflection-table template.

#### Usage notesEdit

• ai pi - he is a drinker
• nuk pi duhan - I do not smoke

## AromanianEdit

### EtymologyEdit

From Latin per. Compare Daco-Romanian pe.

pi

## CatalanEdit

### Etymology 1Edit

From Latin pinus.

#### NounEdit

pi m (plural pins)

1. pine; evergreen tree of the genus Pinus.
2. pinewood

### Etymology 2Edit

#### NounEdit

pi f (plural pis)

1. Pi; the Greek letter Π (lowercase π).

## DalmatianEdit

### EtymologyEdit

From Latin pes, pedem.

### NounEdit

pi m (plural pič)

## FrenchEdit

### Etymology 1Edit

#### NounEdit

pi m (plural pi)

1. pi (Greek letter)
2. (mathematics) pi

### Etymology 2Edit

#### ConjunctionEdit

pi

1. (Quebec, colloquial) Alternative spelling of pis and.

pi (syllabics )

## ItalianEdit

### NounEdit

Italian Wikipedia has an article on:

Wikipedia it

pi m (invariable)

1. pi (Greek letter)

pi

## Kedah MalayEdit

### VerbEdit

pi

1. Go
Satgi kalau depa nak pi keluaq dah, habaq kat aku awai sikit noh, satgi tak dan.
If they are ready to go out, please inform me earlier, so that I won't be late.
Hang ni oghang kata pa pun bukan nak dengaq, mampuih pi kat hang la.
You never listen, just go to hell
2. Do
Hangpa pi bedak elok-elok bagi sama banyak buah moktan tu, satgi baghu tak berkelai.
You should split the rambutans equally between yourselves, then you won't have to fight over it.
Awat yang hang pi pukui dia, satgi dia bawak mai geng pi taboh hang pulak, lagu mana?
Why did you hit him, don't you afraid he might summon his gang to beat you up?

## LojbanEdit

### CmavoEdit

pi (rafsi piz)

1. decimal point
xapixa
6.6
2. point for other numbering systems (e.g., binary, ternary, octal, etc.)

pi

## MandarinEdit

### RomanizationEdit

pi

1. Nonstandard spelling of .
2. Nonstandard spelling of .
3. Nonstandard spelling of .
4. Nonstandard spelling of .

#### Usage notesEdit

• English transcriptions of Mandarin speech often fail to distinguish between the critical tonal differences employed in the Mandarin language, using words such as this one without the appropriate indication of tone.

## NormanEdit

### Alternative formsEdit

• pyid (continental Normandy)
• pid (Jersey, Guernsey)

### EtymologyEdit

From Old French pié, from Latin pes.

### NounEdit

pi m (plural pis)

1. (Sark, anatomy) foot

## PortugueseEdit

### Etymology 1Edit

From Ancient Greek πεῖ (peî).

#### NounEdit

pi m (plural pis)

1. pi (name of the Greek letter Π, π)

### Etymology 2Edit

Onomatopoeia.

#### InterjectionEdit

pi

1. bleep (brief high-pitched sound)

pi

## Serbo-CroatianEdit

### NounEdit

n (Cyrillic spelling пи̑)

1. pi (Greek letter)
2. pi (mathematical constant)

## SloveneEdit

### NounEdit

m inan (genitive píja or , nominative plural píji or )

1. pi (Greek letter)
2. pi (mathematical constant)

#### DeclensionEdit

This noun needs an inflection-table template.

## SpanishEdit

### NounEdit

pi f (plural píes)

1. pi; the Greek letter Π, π

## SwedishEdit

### NounEdit

pi n

1. (mathematics) pi, a constant
2. pi; a Greek letter